Development Game - Animals. Sudoku for the Little Ones

The game "Animals" is a sudoku with pictures for toddlers. Its rules are the same as classic sudoku, but instead of numbers, there are tokens with images. The child needs to look at the card and fill in the empty... cells - but this must be done in such a way that in each row and each column, the same image of an animal appears only once.
 
What is useful in the game?
 
develops logic and attention;
develops logical thinking and memory;
develops fine motor skills;
made from environmentally friendly materials;
contains supporting cards with tasks of varying difficulty.
Game components:
 
base cards - 20 pcs.
tokens - 60 pcs.
The game is suitable for children from 4 years old.